<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
	</head>
	<body>
		<button id="click2log">点我</button>
		<script type="text/javascript">
			document
			.getElementById('click2log')
			.addEventListener('click', function () {
				(new Image()).src = 'http://localhost:8091/?action=log&clk=button';
			});
		</script>
	</body>
</html>